Flea Away DE kills insects by physical action not chemical. The sharp microscopic edges of DE cut into the insects’ bodies, causing them to die of dehydration. DE particles won’t hurt people or pets when they ingest them because the sharp pieces are too small. It is a simple mineral…..silica. You can sprinkle Flea Away DE on your pet’s bedding to kill fleas and as a natural deodorizer because of its absorbing properties. It is also a great wormer for dogs & cats. Just sprinkle a little DE on your pets’ food daily.